SyncAdapter - How to Periodic sync every second

Question

I'm trying to force my application to perform a sync every second, or just every 4 or 5 second. However, the minimum period i can make the syncadapter sync is 30-60 seconds. How can archive such a behavior?

No matter what i set i the second parameter in addPeriodicSync(), it won't be below 30 seconds. ContentResolver.setMasterSyncAutomatically(true); ContentResolver.setIsSyncable(mAccount, AUTHORITY, 1);

    ContentResolver.setSyncAutomatically(mAccount, AUTHORITY, true);
    ContentResolver.addPeriodicSync(
            mAccount,
            AUTHORITY,
            Bundle.EMPTY,
            4);

I am aware that this is a bad behavior for an application as it will drain the battery, and that GCM should have been used to create pushes from the server. The application is for a university project presentation so i need to responsive and presentable.

Edit:

I am aware of the possibility of manual sync :):

Thanks in advance.

Firebase is GCM https://developers.google.com/cloud-messaging/android/android-migrate-fcm I already mentioned in my question. — user1868569, May 22 '16 at 22:32

Thorbear · Answer 1 · 2016-05-23T09:14:12.383

I would just assume that a SyncAdapter cannot be used in this way, since it is specifically designed to not work this way.

If you need an app to perform a sync every second, you should probably just implement an IntentService that restarts itself with a delayed intent (where you can set the delay to 1 second), and do the sync there, rather than in a SyncAdapter.

EDIT: Here's a sample implementation, please don't actually use this for anything but a demonstration though, I feel a little dirty for writing it.

public class ContinuousSyncService extends IntentService {

    private static final int DELAY = 1000; // ms

    public ContinuousSyncService() {
        super(ContinuousSyncService.class.getName());
    }

    public static PendingIntent getPendingIntent(@NonNull Context context) {
        Intent intent = new Intent(context, ContinuousSyncService.class);
        return PendingIntent.getService(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
    }

    private void scheduleNextStart(long delay) {
        ((AlarmManager) getSystemService(Context.ALARM_SERVICE)).set(
                AlarmManager.ELAPSED_REALTIME,
                SystemClock.elapsedRealtime() + delay,
                getPendingIntent(this));
    }

    @Override
    protected void onHandleIntent(final Intent intent) {
        sync();
        scheduleNextStart(DELAY);
    }

    private void sync() {
        // Either use ContentResolver.requestSync()
        // Or just put the code from your SyncAdapter.onPerformSync() here
    }

}

Could you give an example of that is archived? :) – user1868569 May 22 '16 at 23:07 — user1868569, May 22 '16 at 23:07
@user1868569 Added sample implementation. – Thorbear May 23 '16 at 09:14 — Thorbear, May 23 '16 at 09:14

score 0 · Answer 2 · edited May 23 '17 at 12:23

0

You cannot schedule a sync at intervals under 60 seconds.

You can confirm this by reading the code, or by reviewing this SO answer

edited May 23 '17 at 12:23

Community

1
1

answered May 22 '16 at 22:40

G. Blake Meike

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score 0 · Answer 3 · answered May 23 '16 at 04:14

I have done this way:

Add permission <uses-permission android:name="android.permission.WRITE_SYNC_SETTINGS" /> in Manifest file.

Add below method for Sync:

public void syncAllAccountsPeriodically(Context contextAct, long seconds) throws Exception {
    AccountManager manager = AccountManager.get(contextAct);
    Account[] accounts = manager.getAccountsByType("com.google");
    String accountName = "";
    String accountType = "";
    for (Account account : accounts) {
        accountName = account.name;
        accountType = account.type;
        break;
    }

    Account a = new Account(accountName, accountType);
    ContentResolver.addPeriodicSync(a, AUTHORITY,
        Bundle.EMPTY, seconds*1000);
}

Hope this should help you.

SyncAdapter - How to Periodic sync every second

3 Answers3